if you have access to the router then dont bother changing the address, just make sure you remember what it is so you can access it again when you need to.you can connect with opera now.. what about with everything else? the isp username and password is not admin and password. that is the password to access the router, nothing else. the ISP name and password are the name and password they provided you to access your internet account. as an example, my ISP provided me with a username selected by me, dakster1, and i provided my own password too, when setting up my account. my email address via my ISP is firstname.lastname@example.org, reflecting my chosen username.if opera is online though, then you must have entered the correct details anyway. without those details your ISP would not let you connect. As far as the other details go, all ISPs have different requirements. You'll need to call your ISP and ask them what the settings are in their case.
Mitz from Tips4pc